/*
 * Copyright (c) 2013, Klaus Hauschild
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided
 * that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice, this list of conditions and
 *     the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
 *     and the following disclaimer in the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.hauschild.utilsn.core.animation;

import playn.core.Image;
import playn.core.PlayN;
import playn.core.util.Callback;

/**
 * @since 0.1.0
 * 
 * @author Klaus Hauschild
 */
public abstract class Animations {

  public static void load(final String image, final float frameWidth, final int millisPerFrame, final boolean looping,
      final Callback<Animation> callback) {
    PlayN.assets().getImage(image).addCallback(new Callback<Image>() {

      @Override
      public void onFailure(final Throwable cause) {
        callback.onFailure(cause);
      }

      @Override
      public void onSuccess(final Image result) {
        final int frameCount = (int) (result.width() / frameWidth);
        if (frameCount * frameWidth != result.width()) {
          callback.onFailure(new RuntimeException(String.format(
              "Image strip width [%s] is no multiple of frame width [%s].", result.width(), frameWidth)));
        }
        final Image[] frames = new Image[frameCount];
        for (int i = 0; i < frameCount; i++) {
          frames[i] = result.subImage(i * frameWidth, 0, frameWidth, result.height());
        }
        callback.onSuccess(new AnimationImpl(frames, millisPerFrame, looping));
      }

    });
  }

  public static void load(final String[] images, final int millisPerFrame, final boolean looping,
      final Callback<Animation> callback) {
    final Image[] frames = new Image[images.length];
    for (int i = 0; i < images.length; i++) {
      final int index = i;
      PlayN.assets().getImage(images[i]).addCallback(new Callback<Image>() {

        @Override
        public void onFailure(final Throwable cause) {
          callback.onFailure(cause);
        }

        @Override
        public void onSuccess(final Image result) {
          frames[index] = result;
          if (framesReady(frames)) {
            callback.onSuccess(new AnimationImpl(frames, millisPerFrame, looping));
          }
        }

        private boolean framesReady(final Image[] frames) {
          for (final Image image : frames) {
            if (image == null) {
              return false;
            }
          }
          return true;
        }

      });
    }
  }

}
